WX 20 cannot display configuration and License expired ...

I have an WX20 , I can access it by ssh and web , in top of the interface web I have an error " License expired" , I tried to enter the key license again , the license key is entered successfully but still have the same error "License expired" , I restarted the WX but without result .

Another issue is that I cannot display the configuration nor by web interface, nor by ssh CLI command:

1- By Cli command I have this error:

WX# show config

Cannot open file.please check if it exists.

2- By web interface : ADMIN then DISPLAY CONFIGURATION :

@PN_FILETYPE@ /ata1/cfg/OE51B560.cfg.

I think that the license error is relied to that WX unable to read the configured key.